I know you know how to use black bars, so this would be a good place to.

a significant boost in moral

Morale.

D-7568583

Usually I see D-class with way less digits denoting them.

cappacino

Cappuccino.

undercover foundation researcher

From what I know of the foundation, I think it's the field agents that go undercover, not the researchers.

SCP-PPPPP

That's one too many P's, by my count.

after beginning to notice a personal lack of motivation

Does this mean that he was influenced by SCP-PPPP and noticed it? You would think that the object would have hit the media long before ██.██.20██ if people noticed themselves not working with as much effort.

This seems to me like a fairly good idea. If I didn't know any better, I would say that it was influenced by an SCP fuel picture of a plaque that actually said that. Your execution could be a bit better, but a few touch-ups and this could get pretty great pretty quickly.

I'm going to disagree with l33tr above. I don't think this is close to ready, and the article has quite a lot of problems. Line-by-line and general critique incoming.

EDIT: I'm going to hold off on the line-by-line, since that appears to have been covered a couple of times now.

Conceptually, it's boring. It's a magic item that does a thing for some reason, and that's it. I've written at great length about compulsion effects previously, but suffice to say that in most cases things that make people act a particular way don't really resonate with me.

The extended test logs are essentially filler. You've established up front the whole caffeine thing, and the slight tweaks on that relationship aren't enough to make something that's fundamentally uninteresting into something that's compelling my interest.

The first addendum is entirely unnecessary, since the idea that a Foundation agent is just randomly walking around somewhere and attributing "a personal lack of motivation and genuine disgust towards work" to a skip is completely ludicrous. The second addendum serves to pointlessly make this thing lethal, and doesn't really do anything for the article.

Generally speaking, this is thin, it doesn't really cover anything new in terms of a narrative, and a good deal of the article is text that doesn't really serve a whole lot of purpose.

I want to add more test logs to make it more intriguing, the idea would be that brand labeled coffees like Starbucks and costa effect people in very specific ways, as well as those who have a very specific opinion on certain beverages.

I was thinking something like a test subject could drink a Christmas themed drink (as we get at this time of the year) and the test could mention something silly like 'the subject completed the task within twenty-five minutes, subject was noted whistling 'jingle all the way' through the entire test.

Adding test logs does nothing to make something more interesting. Test logs serve to slowly reveal more about what has already been established in the description. Basically, if you need test logs to hook your reader, you've lost. They've already downvoted and moved on.

SCP-PPPP must be wrapped in a sheet to ensure no-one is effected by SCP-PPPP's anomalous properties.

No one, affected.

SCP-PPPP is a 14x14 inch stone plague with the phrase: 'WITH ENOUGH COFFEE ANYTHING IS POSSIBLE’ written on it in white text.

Plaque, quotation marks rather than apostrophes (you're quoting what something reads), probably better not to caps-lock it. You could just say it's written in all caps. Also, the Foundation uses metric.

When a person has read the phrase, they will begin to show a lack of motivation towards completing tasks they personally deem as important, this effect will worsen over time and affected individuals will only feel the need to complete tasks if they have recently consumed a reasonable amount of caffiene before starting, this will ware of as time progresses and the effects of the caffeine begin to fade.

Massive run-on sentence. Change the bolded comma to a semicolon, change the comma after "starting" to a period. Wear off, not ware of. Also, "reasonable amount" doesn't really tell the reader anything, and contributes to the overall lack of clinical tone in this article.

Those effected by SCP-PPPP who have ingested caffeine show various side effects which may differ significantly between each person, and strongly depend on the subjects personal preference towards the caffeinated food or drink they have consumed, place of work and task they are given.

Again, affected. Subject's, not subjects. If it's plural subjects, then it's subjects', but I don't think it is in this case. This is also a bit of a run-on as well, and I always recommend using an Oxford comma but it's a matter of preference.

Results: Subject gained a significant boost in morale and sorted through files in less then fifteen minutes showing great levels of pleasure while doing so.

There should be a comma after "minutes", but the last part needs to be rewritten in the proper tone, as mentioned previously.

Subject: D-768483, former office worker only fluent in the french language.

Capitalize French, and it's probably better to just say "fluent in French".

Results: Despite not being able to speak or read english, subject completed task in twenty minutes.

Capitalize English.

Food/drink: One cup of ‘Costa’ brand cappucino (Claimed to be subjects favoured brand of coffee and beverage).

Apostrophe again, and adding "beverage" in when you previously only specified coffee when it came to what someone's favorite brand was doesn't make much sense.

Notes: Subject was not informed that coffee was decafinated.

Decaffeinated. (I recommend having spell check on in whatever program you write in - it would have solved a lot of these minor errors.)

it was found that SCP-PPPP had effected a large sum of staff and students throughout the college and was then located and contained without incident. SCP-PPPP was replaced with a non anomalous replica.

Affected. I recommend a period after "college", followed by "It was then" and the rest of the sentence. Non-anomalous, with a hyphen.

and went into a full body epilepsy

Full-body, with a hyphen. Also, I think you mean seizure, because epilepsy is a type (there are several types, actually) of disorder that causes seizures.

attack several members of security personnel with their own guns, subject was recorded shouting 'I don't even need to pull the trigger to kill you!'.

Period after "guns", and would the subject really say that? Say it out loud in your head, or envision a movie scene, and then change the dialogue to sound more realistic based on that.

The subject was subsequently terminated and █ security personnel were [REDACTED] during the process.

Redacted at the last minute for scare factor? Probably unnecessary, given the context of the rest of the article.